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75eff3fe90
This patch moves the AArch64 port to the main sysdeps hierarchy. The move is essentially: git mv ports/sysdeps/aarch64 sysdeps/aarch64 git mv ports/sysdeps/unix/sysv/linux/aarch64 sysdeps/unix/sysv/linux/aarch64 The README is updated and I've updated ChangeLog.aarch64 along the lines of the ARM move. The AArch64 build has been tested to confirm that there were no changes in objdump -dr output or the shared objects.
90 lines
2.2 KiB
ArmAsm
90 lines
2.2 KiB
ArmAsm
/* Set current context.
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Copyright (C) 2009-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include "ucontext_i.h"
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#include "ucontext-internal.h"
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/* int setcontext (const ucontext_t *ucp) */
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.text
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ENTRY(__setcontext)
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/* Create a signal frame on the stack:
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fp
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lr
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...
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sp-> rt_sigframe
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*/
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stp x29, x30, [sp, -16]!
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cfi_adjust_cfa_offset (16)
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cfi_rel_offset (x29, 0)
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cfi_rel_offset (x30, 8)
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mov x29, sp
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cfi_def_cfa_register (x29)
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/* Allocate space for the sigcontext. */
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mov w3, #((RT_SIGFRAME_SIZE + SP_ALIGN_SIZE) & SP_ALIGN_MASK)
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sub sp, sp, x3
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/* Compute the base address of the ucontext structure. */
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add x1, sp, #RT_SIGFRAME_UCONTEXT
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/* Only ucontext is required in the frame, *copy* it in. */
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#if UCONTEXT_SIZE % 16
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#error The implementation of setcontext.S assumes sizeof(ucontext_t) % 16 == 0
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#endif
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mov x2, #UCONTEXT_SIZE / 16
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0:
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ldp x3, x4, [x0], #16
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stp x3, x4, [x1], #16
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sub x2, x2, 1
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cbnz x2, 0b
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/* rt_sigreturn () -- no arguments, sp points to struct rt_sigframe. */
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mov x8, SYS_ify (rt_sigreturn)
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svc 0
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/* Ooops we failed. Recover the stack */
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mov sp, x29
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cfi_def_cfa_register (sp)
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ldp x29, x30, [sp], 16
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cfi_adjust_cfa_offset (16)
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cfi_restore (x29)
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cfi_restore (x30)
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b C_SYMBOL_NAME(__syscall_error)
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PSEUDO_END (__setcontext)
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weak_alias (__setcontext, setcontext)
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ENTRY(__startcontext)
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mov x0, x19
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cbnz x0, __setcontext
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1: b HIDDEN_JUMPTARGET(_exit)
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END(__startcontext)
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